Oh. Can you tell me how it is controlled, i.e. how a link is hidden from the search engines?

Search Engines follow an attribute in a link called rel="nofollow" which if added SE bots would not follow the links on the pages and this is added to the signatures if any user has post count in 2 digits or less

Search Engines follow an attribute in a link called rel="nofollow" which if added SE bots would not follow the links on the pages and this is added to the signatures if any user has post count in 2 digits or less